Five years after a traumatic accident that killed his wife and ended his career, former profiler Noah Wallace is called back to duty. A postcard found at a gruesome crime scene in Canada directly implicates him, suggesting the return of the "Demon of Vermont"—a serial killer believed to be dead.

Noah’s former partner and friend who brings him into the new investigation. Thematic & Stylistic Elements El triciclo rojo (Novela de intriga) - Amazon.es

An intrepid journalist and blogger specializing in unsolved mysteries and conspiracies.

A brilliant but broken criminalist struggling with severe psychological and physical trauma from his past.

In New York, a young blogger and journalist receives a mysterious email leading her to the Darknet. She begins tracking a reporter who vanished in the 1970s, uncovering links to secret organizations and historical secrets. Key Characters

The plot weaves together two primary investigative threads that eventually converge: